FURTHER INFORMATION

Projects

Give and take: how much water does soil retain for trees?

Knowledge about plant available soil water is often the missing link to understand large-scale vegetation health observations. This project aims at modelling soil water fluxes with an emphasis on below-ground processes to improve our ability to explain patterns of impacted forest health condition.

XELLCLIM

We identify the best xylem cell anatomical features for climate reconstructions and assess their characteristics across temporal scales compared to established tree-ring parameters, and against instrumental records and climate model simulations.

Drought 2018 - TreeNet meets Sentinel2

TreeNet permanently measures growth and tree water deficit (TWD) of about 250 tree individuals in forests all over Switzerland with so-called point dendrometers. TWD has shown to be a reasonable biological indicator for drought stress and quantifies the amount of missing water a tree needs to reach full saturation. In combination with spectral anomalies of satellite-based indices (e.g., NDWI from Sentinel2ab) between 2018 and a reference period we test whether we can find a close link between the two drought stress indicators.

FORClimateS

The project aims to aggregate and synthesize existing information on different spatial and temporal scales to provide decision-makers with relevant and robust information on short- and long-term risks for forests and forest functions and on adaptation strategies under different climate futures

Legacy effects on stem growth

Establishing hydrogen isotope analysis of organic material

We aim to develop a method for hydrogen isotope (d2H) analysis of organics which will have many applications in plant and soil sciences and thereby provide a powerful new tool to disentangle and reconstruct past and present physiological, biochemical, and hydrological processes.

GenWood

We link genomic and dendro-phenotypic data in Norway Spruce (Picea abies) to study the genomic basis of wood anatomy and assess the adaptive potential of forest trees under climate change.

Isodrought

We want to explore a stable isotope tree-ring approach for analyzing physiological drought responses of trees. The results are expected to provide a novel diagnostic tool for understanding causes of tree decline.

BLACKDYNAMITE

This Swiss-Spanish project investigates the dynamics and competition of the black Périgord and Burgundy truffles under the influence of climate change.

Root endophytic fungi and their contribution to arctic and alpine climate change feedback

Arctic and Alpine vegetation dynamics under climate change can exert a lasting impact on belowground processes and ultimately on world's largest carbon stocks. This long-term field manipulation investigates the functional significance of plant interactions with species-specific endophytic fungi.

Environmental impact on wood formation

Wood formation is a process that not only fix carbon into the wood structure, but also determine how much and how safely water can be transported trough the stem of a tree. This project make use of dated tree-rings to investigate how the environment impacts wood formation and structure

Photoperiod and ciracian clocks - effects on adaptation and acclimation

Do evolutionary constraints on photoperiod and circadian clocks hinder adaptation and acclimation of plants to climate change? With this project, we will provide the mechanistic basis and a conceptual framework to understand how climatic and daylight/photoperiod cues jointly affects tree functioning.

The Swiss long-term monitoring and experimental network

In close collaboration with the SwissForestLab, the site-operating institutions Swiss Federal Research Institute WSL, ETH Zurich, and University of Basel are key players in the national ecosystem and environmental research.

QUPFIS

Our aim is to estimate Swiss forest net ecosystem productivity (NEP) at monthly or seasonal resolution for each individual year in order to link biomass changes over time with global drivers.

Carbon storage and ungulate browsing

The joint effects of drought tolerance and herbivory is determined by analysing the extent to which water use efficiency and C storage of Abies alba saplings are influenced by genetic factors and ungulate browsing.

Forests under stress

In this project we will assess the physiological processes by which trees adjust and interact among each other under a changing climate, determine the consequences of these processes on forest responses to climatic stresses and improve our understanding of these effects on forests functioning at a large comprehensive scale.

PRO3FILE

To improve our assessment of ozone effects on forest ecosystems, we advocate the need (i) for further experimental and long-term monitoring studies and (ii) to develop physiological and demographic modelling tools.

Junior Research: Der Waldboden lebt, Föhren sterben heimlich und Jahrringe erzählen aus der Vergangenheit

Was steckt hinter diesen Aussagen? SchülerInnen vertiefen sich in eines dieser Themen, eignen sich neues Wissen an, lernen genau hinzuschauen und haben Gelegenheit, sich zeigen zu lassen, wie in der Forschung gearbeitet wird.

TEA-Electrical potentials and accoustic emissions of trees

TEA combines established methods in ecophysiology (i.e., measuring sap flow, detecting continuous stem radius changes, and recording the microclimatic conditions) with advanced methods of measuring ultrasonic acoustic emissions (UAEs) and detecting electrophysiological signals, so-called electrical potentials (EPs).

Metalink

Soil contamination with heavy metals is a widespread problem affecting natural, cultivated, urban and industrial sites throughout Europe. The main objective in this Swiss/Polish collaboration project is to characterize the links between environmental, genotypic, and phenotypic features in the metal-tolerant plant model Arabidopsis halleri.

Tea bag decomposition study

Examining drivers of litter decomposition

Considering nature conservation in thinning

The project aims to examine how a balance between ecological and economic goals in thinning decisions can be achieved.

CaNuPine/MICRO

In this project, adaptive and stress responses to drought stress and varying nutrient availability are being analyzed at tissue, cell and subcellular level in foliage of Scots pine and downy oak.

Carbon and nutrient dynamics of Scots pine

In the CaNuPine project, we study the effects of drought and nutrient availability on the carbon dynamics within Pine (Pinus sylvestris) trees. This will contribute to the controversial debate whether drought may or may not cause acute growth decline and mortality via carbon starvation.

Wildfire, insect attack and windthrow in mountain forests are on the rise again

Eine internationale Gruppe von Forschern zeigt, dass zunehmende Fläche und Holzvorräte in Bergwäldern in den letzten 150 Jahren zu mehr natürlichen Störungen wie Waldbrand geführt haben.

Compartmentation of de-icing salts and structural reactions to salt accumulation in foliage of ornamental lime trees

Street greenery has recently emerged as a major research and urbanization issue. The main objectives in this project are to study the accumulation and effects of de-icing salts in foliage of lime trees (Tilia x vulgaris) and to apply this knowledge for selecting more tolerant lime species and cultivars, with a view to street plantation.

Integrated Carbon Observation System (ICOS)

Integrated Carbon Observation System (ICOS) is a European research infrastructure to quantify and understand the greenhouse gas balance of the European continent and of adjacent regions.

Götterbäume in der Südschweiz

Götterbäume breiten sich derzeit rasant in den milden Lagen der Südschweiz aus und werfen vor allem im Schutzwald grosse Fragen auf: Als kurzlebige Pionierbaumart mit gebietsweise hohem Kernfäulebefall können sie zu einer Destabilisierung beitragen, die waldbaulich schwer zu korrigieren ist.

Net Ecosystem Productivity - NEPSRI

Point dendrometer-based SRI data are collected within the project TreeNet and used to estimate NEP. The estimation is performed in near-real-time on the TreeNet processing platform (TreeNet_Pro) and needs temporally highly resolved SRI data and a site-specific leaf area index as input.

MOUNTROOT

The project MOUNTROOT aims at comparing structure-function relationship in roots of two dominant herb species of pasture-woodlands in response to simulated climate change, and to integrate these below-ground insights with above-ground responses to a whole-plant framework.

Impact of fuel wood piles on saproxylic beetles

In Switzerland, a strong increase in the demand for energy wood is expected for the next decades. This is likely to have a strong influence on saproxylic beetles (dependent on dead wood). On the one hand, fewer old trees and less deadwood will remain and decompose in the forest, which directly limits habitat availability for saproxylics. On the other hand, fuel wood exploitation might have indirect ecological consequences.

Dynamics of Forest-Grassland Ecotones

Ecotones are dynamic over-lapping boundary areas where major terrestrial biomes meet. Ecotones are sensitive to climate change and/or human-induced impacts. Environmental changes in ecotones will lead to changes in species composition, biodiversity, structure, functioning, and serves at ecosystem level and regional level.

Antimony uptake as a function of waterlogging in the rhizosphere

Antimony (Sb) is a rather rare but toxic element increasingly contaminating ecosystems. Principal objectives in this project are to investigate the role of changes in the soil conditions and root structure on the uptake of Sb. The results will provide understanding of the soil and root processes governing Sb availability and plant uptake.

Wild fire and insects

In 2003 some 300 ha of forest on the hillside above Leuk burnt down. Along a horizontal gradient from within-forest to the center of the fire area and along an altitudinal gradient from 1200 to 1700 m a.s.l. we investigate the process of colonization by insects and the succession of the taxonomic and functional groups.

trees

In our research project 'trees: Rendering Ecophysiological Processes Audible', we are working on the acoustic recording, analysis and representation of ecophysiological processes in plants and studying the acoustic and aesthetic requirements for making them perceptible.

Disentangling truffle ecology

We study the complex biotic and abiotic ecology and the population genetics of the Burgundy truffle (Tuber aestivum) in Switzerland and the German pre-Alps, with particular emphasis on the ecological and climatological drivers for the productivity and phenology of this most valuable truffle species.

Stillberg enzyme activities

Climate change will particularly influence species distribution and the structure and function of sensitive ecosystems at the treeline. In an interdisciplinary experiment carried out at Stillberg Davos we will investigate how soil warming and enhanced CO2 concentrations will affect the ectomycorrhizal community structure and extracellular enzyme activities in the soil and at mycorrhizal roots.

How beeches cope with drought

The BuKlim project aims to study the responses of Swiss beech provenances to drought. The results of the project help to assess the adaptational potential of this tree species to the changing climate.

chestnut blight

The introduced chestnut blight fungus Cryphonectria parasitica causes severe damage to chestnut forests and orchards across Europe. We investigate the biology and epidemiology of the disease and provide the scientific basis for biological control.

Below-canopy climate

Microclimate is a key factor influencing regeneration in forests. Particularly available light, water supply and temperature determine the success or failure of certain tree species. How will future climate change influence below-canopy microclimate and tree regeneration?

Evolutionary traits

Elevated heavy metal concentrations in the soil are a frequent consequence of past or ongoing industrial activities. The principal objective in this project is to characterize mechanistic aspects of metal accumulation and tolerance and relate it to the genetic structure of populations of Biscutella laevigata. The expected results should provide innovative insights on evolutionary processes of metal tolerance.

MICRO

Microscopical changes in cells and tissues in response to various environmental stress factors are investigated in trees to develop diagnosis tools and understand the mechanistic link between stress and injury.

Exotic tree species

Exotic tree species, which are adapted to a warmer and dryer climate, could contribute to coping with climate change. Six such species are tested in a long-term field experiment near Mutrux (Canton of Vaud).

Foliar symptoms specific for ozone stress in rain forest trees of southern Brazil

The toxic effects of tropospheric ozone concentrations on plants have been reported primarily for ecosystems from the northern hemisphere with a mediterranean, temperate or boreal climate. In the southern hemisphere with its tropical climate, the impact of ozone on natural ecosystems is still mostly unknown.

Boron & salt allocation

With a quickly growing world population and raising demand for agricultural products, the productivity of irrigated agricultural soils is threatened as a consequence of soil salinization in many places with arid climates. Main objectives of this research project are to investigate the compartmentation-based mechanisms contributing to tolerance in foliage of poplar trees grown on soils contaminated with elevated levels of Boron and salts in the San Joaquin Valley in Central California.

Kastanienrindenkrebs

Der eingeschleppte Kastanienrindenkrebs gefährdet die Edelkastanienbestände auf der Alpennordseite. Um diese Bestände zu erhalten, wird im Rahmen dieses Projektes der Kastanienrindenkrebs auf der Alpennordseite mit hypovirulenten Pilzstämmen bekämpft

Soil as a site factor

This project delivers soil and site related information for Swiss forests which are based mainly on measured values: (i) response of tree species relating to direct and indirect environmental variables, (ii) quantitative characterisation of species' ecological niche and (iii) soil ecological indicator values for forest plant species.

Trockenheit als limitierender Faktor für An- und Aufwuchs von Hauptbaumarten

Für die Anpassung unserer Wälder an ein wärmeres Klima sind verschiedene Strategien denkbar. In diesem Projekt wird die Plastizität verschiedener Provenienzen von Waldföhre und Fichte bezüglich Trockenheit in der Jugendphase untersucht.

Nadelbäume und Trockenheit

Sehr starke waldbauliche Eingriffe im Gebirgswald können kurzfristig ökonomisch vorteilhaft sein. Langfristig könnten sie aber die Waldverjüngung verzögern und den Holzuwachs vermindern. Ob solche nachteiligen Auswirkungen auftreten und wie gross sie allenfalls sind, wird mit retrospektiven ertragskundlichen und dendroökologischen Erhebungen in Gebirgswäldern abgeschätzt.

Tree regeneration after windthrow

Wind disturbance is the main natural driver of forest stand dynamics in Central and Northern Europe. On the basis of a large sample of windthrow gaps, this project aimed to quantify natural tree regeneration after wind disturbance, and to identify factors influencing tree regeneration dynamics.

Mountland

The goal of ‹Mountland› is to investigate the sensitivity of the provision of mountain ecosystem services to both climatic and land-use changes and to suggest policies and governance structures for mitigating the impact of such changes and enhancing sustainable management practices.

Germination experiment

Recent Scots pine mortality in forests of the upper Rhone valley have been suggested to be caused by climate change. In an ongoing PhD study, effects of different climate parameters and interspecific competition on the regeneration of both Scots pine (Pinus sylvestris) and black pine (Pinus nigra) are tested.

Querco

Querco, in the sense of "quid Quercus, quo vadis?" To study the reaction of 3 local species of oak (each species with 4 provenances) to drought, increasing air temperature and a combination of the two will be the focus of this experiment.

Mycorrhiza and forest fire

In this project, we aim to investigate 1) to what extent diversity of mycorrhizal fungi is diminished by forest fire, and 2) whether this has consequences for performance of Pinus sylvestris seedlings.

Lötschental

Lötschental offers an ideal setting to study the influence of global warming on tree-growth

Macro- and micro morphological reactions to low soil water availability in the foliage of Scots pine from Wallis

In this project, the structural changes in foliage of Scots pine are used as sensitive bioindications of environmental constraints to study the reactions of dry pine forests in Wallis to low soil water availability and changes in land use.

Evoltree

A large network of research institutions collaborates within an EC-funded Network of Excellence to study the impacts of climate change on forest ecosystems from an evolutionary perspective.

Composition of the driftwood

During the floods in August 2005 in Switzerland, many villages encounter problems not only because of a high water flow, but also because of large amounts of driftwood. Therefore the question of the origin and the formation of the driftwood arised.

Impact of leaf litter collecting in forests

Only 150 years ago, Swiss forests were markedly affected by agro-forestal uses. In many places leaf litter was collected for different reasons. By experimental removing of the leaf litter, we examine the ecological consequences of this forest use and we evaluate it's potential as a new tool for nature conservation in forests.

Irrigation Experiment Pfynwald

Drought-induced forest decline will gain in importance as the frequency and severity of drought events are expected to increase in the context of climate change. To understand how chronic drought affects tree growth, we study mature Scots pine in an irrigation experiment in an inner-Alpine dry valley since 2003.

Nadelchemie der Fichte

Mit dem Projekt "Monitoring Flankierende Massnahmen Umwelt" (MFM-U) untersucht die Schweiz die Umwelt-Auswirkungen des Landverkehrsabkommens mit der EU sowie die Umwelt-Auswirkungen der flankierenden Massnahmen. Im diesem Teilprojekt stehen die Auswirkungen auf den Wald im Vordergrund.

Diagnose von Wald- und Baumkrankheiten

Wichtige Informationen zur Beurteilung der Waldgesundheit stammen aus der Beratung, bei welcher mittels differenzialdiagnostischen Methoden die Ursachen von Baumkrankheiten analysiert werden. Die Kunden agieren als externe Mitarbeiter und erhalten als Gegenleistung die Diagnose inklusive einer Empfehlung für das geeignete weitere Vorgehen.

Treeline in Ural

Historical photographs document that the upper treeline of the Ural mountains has moved up 60 to 80 m during the last century. We assess how the expansion of forests into tundra affects soil organic matter dynamics in the pristine Southern, Northern and Polar Ural.

Soil solution in LWF plots

The chemistry of soil solution and the soil water availability for plants have been monitored since 1997 in seven forest plots in Switzerland. This project, linked to the Swiss Long-term Forest Ecosystem Research project (LWF), aims to assess the soil response to atmospheric pollution (acidifying substances and nitrogen) and to climate change.

Tree Response to Climate Change - Valais

In Valais, Scots pine (Pinus sylvestris) and pubescent oak (Quercus pubescent) grow at least temporally at the edge of their physiological capabilites. We investigate the (potential) adaptation of these and co-occurring tree species to climate change and search for limits they might reach with increasing temperatures and droughts.

Nitrogen and ground vegetation

Ground vegetation is a powerful bio-indicator of the environment. The project aims at discriminating the various factors which may influence the dynamics of ground vegetation. Emphasis is being given to the role of nitrogen.

The Swiss Long-term Ecological Network

The Swiss Long-term Ecological Network is a set of highly instrumented research platforms (LWF-sites). It is designed to collect, store, manage, analyse and interpret long-term data based on a set of key physical, chemical and biological variables, which drive and respond to environmental changes.

Crown condition assessment

It is important to have good information on the condition of the trees in the plots. Therefore scientists determine the relationships between crown condition and a number of environmental parameters.

Windthrow fauna

After the devestating windstorms in 1990 (Vivian) and 1999 (Lothar) investigations were started to monitor the development and succession of the insect fauna on cleared and uncleared windthrow areas, relative to control treatments in the intact forest. Until now, insects have been sampled during 7 (Vivian) and 4 (Lothar) years.

Schadenanalysen in Forstentomologie

Insekten prägen massgebend die Dynamik unserer Waldökosysteme. Informationen zur Verbreitung, Biologie und Epidemiologie der Waldinsekten dienen dazu, für Praxis und Behörden angepasste Massnahmen der Überwachung und Bekämpfung zu erarbeiten.

TreeNet

TreeNet is a biological drought and growth indicator network of forest ecosystems. It provides information about drought responses of trees all over Switzerland and their effects on the carbon balance of forests. TreeNet links the research of the eddy flux super sites Davos and Lägeren to the forest next to your home.

WATER

A network of four research institutions collaborates within an EC-funded Network of Excellence to determine and understand the influence of genetic diversity of trees and site water regime on neutral and functional diversities of the associated mycorrhizal community.

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Publications

Staff

Forest Dynamics

Prof. Dr. Andreas Rigling

head of research unit, member of directors board

Ecophysiology

Dr. Marcus Schaub	teamleader
Maité Buttet	master student
Dr. Maxime Cailleret	visiting scientist
Nicolas De Girardi	temporary employee
Dr. Zhong DU	visiting scientist
Dr. Sophia Etzold	scientific staff member
Xiaogai Ge	visiting scientist
Jonas Gisler	technical staff member
Dr. Madeleine S. Goerg-Günthardt	visiting scientist
Dr. Rudolf Häsler	visiting scientist
Dr. Simon Knüsel	Postdoc
Prof. Dr. Maihe Li	senior scientist
Marcus Maeder	visiting scientist
Luc Schnell	civil service employee
Dr. Leonie Schönbeck	Postdoc
Dr. Volodymyr Trotsiuk	Postdoc
Benjamin Turc	PhD student guest
Dr. Pierre Vollenweider	scientific staff member
Ao Wang	PhD student guest
Yann Wittwer	master student
Dr. Lijun Wu	visiting scientist
Yue Yang	PhD student guest
Yanli Zhang	master student
Dr. Katarzyna Zieminska	Postdoc
Dr. Roman Zweifel	scientific staff member

Disturbance Ecology

Dr. Thomas Wohlgemuth	senior scientist, teamleader
Céline Aymon	trainee
Alexandra Ennen	temporary employee
Dr. Esther Frei	scientific staff member
Rungnapa Kaewthongrach	PhD student guest
Dr. Arun Kanti Bose	Postdoc Marie Curie
Martin Kistler	trainee
Dr. Frank Krumm	scientific staff member
Dr. Barbara Moser	scientific staff member
Ursina Rathgeb	trainee
Dr. Daniel Scherrer	scientific staff member
Ulrich Wasem	technical staff member

Dendrosciences

Dr. Georg von Arx	teamleader
Jan Altman	visiting scientist
Dr. Flurin Babst	visiting scientist
Dr. Jesper Björklund	scientific staff member
PD Dr. Ulf Büntgen	senior scientist
Dr. Daniele Castagneri	Postdoc Marie Curie
Prof. Dr. Paolo Cherubini	senior scientist
Paula Coroiu	PhD student
Dr. Marina Fonti	technical staff member
Dr. Patrick Fonti	scientific staff member
Prof. Dr. David Frank	visiting scientist
Dr. Holger Gärtner	scientific staff member
Sven Kottlow	trainee
Danijar Manser	trainee
Dr. Elisabet Martinez Sancho	Postdoc
Lenka Matéju	technical staff member
Maria Elvira Murazzi	trainee
Daniel Nievergelt	technical staff member
Dr. Bianca Blyth Perren	visiting scientist
Richard Peters	visiting scientist
Frederick Reinig	PhD student
Sabine Rothenbühler	master student
Dr. Christopher Sargeant	Postdoc
Loïc Schneider	technical staff member
Prof. Dr. Fritz Schweingruber	visiting scientist
Dr. Annemiek Irene Stegehuis
Dr. Kerstin Treydte	scientific staff member
Anne Verstege	technical staff member

LWF I

Prog. SwissForestLab

Dr. Yann Vitasse

scientific staff member

Ecosystem-Ecology

Prof. Dr. Arthur Gessler	teamleader
Frederik Baumgarten	PhD student
Dr. Julia Born	projectmanager
Dr. Alessandra Bottero	Postdoc
Simon Buschor	bachelor student
Nicolas De Girardi	temporary employee
Margaux Didion-Gency	PhD student
Matthias Diener	temporary employee
Prof. Dr. Ingo Ensminger	fellow
Dr. Charlotte Grossiord	Postdoc NF
Iulian-Dan Gutas	visiting scientist
Dr. Matthias Haeni	Data Scientist / System Engineer
Christian Hug	technical staff member
Dr. Stefan Hunziker	Scientific data quality specialist
Peter Jakob	temporary employee
Dr. Jobin Joseph	scientific staff member
Geoffrey Klein	visiting scientist
Simpal Kumar	software engineer
Dr. Marco Lehmann	scientific staff member
Eugénie Isabelle Mas	master student
Christian Maurer	temporary employee
Shengnan Ouyang	PhD student guest
Stefan Peter	temporary employee
Alfred Potzinger	temporary employee
Prof. Dr. Martine Rebetez	senior scientist
Joel Sames	temporary employee
Dr. Matthias Saurer	scientific staff member
Léonard Schneider	PhD student guest
Philipp Schuler	PhD student
Raphael Siegrist	temporary employee
Dr. Rolf Siegwolf	visiting scientist
Martin Steiner	civil service employee
Tanja Stutz	temporary employee
Flurin Sutter	GIS specialist
Valentin Tanner	master student
Dr. Valentina Vitali	Postdoc
Dr. Yann Vitasse	scientific staff member
Micah Wilhelm	scientific assistant

Master thesis

Open Master thesis in the group Mycorrhiza, Research Unit Forest Dynamics

Seasonal and spatial genetic patterns of a natural population of Burgundy truffles (Tuber aestivum)

Further information (PDF)

Population dynamics in 16 natural Burgundy truffle sites

Further information (PDF)

Development of mycorrhiza colonization of inoculated trees in a Burgundy truffle plantation (Tuber aestivum)

Further information (PDF)

Small-scale distribution of individuals and mating types of the widespread mycorrhizal fungus Cenococcum geophilum

Further information (PDF)

Where are the fathers? Small-scale distribution of individuals and mating types of Burgundy truffles (Tuber aestivum) in natural truffle locations

Further information (PDF)

Is the population structure of the widespread mycorrhizal fungus Cenococcum geophilum influenced by the water availability in the soil and the genetics of the host plant?

Further information (PDF)

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WSL Institute for Snow and Avalanche Research SLF in Davos

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LWF I

Open Master thesis in the group Mycorrhiza, Research Unit Forest Dynamics

Seasonal and spatial genetic patterns of a natural population of Burgundy truffles (Tuber aestivum)

Population dynamics in 16 natural Burgundy truffle sites

Development of mycorrhiza colonization of inoculated trees in a Burgundy truffle plantation (Tuber aestivum)

Small-scale distribution of individuals and mating types of the widespread mycorrhizal fungus Cenococcum geophilum

Where are the fathers? Small-scale distribution of individuals and mating types of Burgundy truffles (Tuber aestivum) in natural truffle locations

Is the population structure of the widespread mycorrhizal fungus Cenococcum geophilum influenced by the water availability in the soil and the genetics of the host plant?